As for the rim that the dynamo hub is set into, it is not particularly good and certainly doesn't look anything like the existing Muddy Fox rim. I have therefore decided to have the dynamo removed from the new wheel and installed in my MF rim. The MF rim is in very good condition and will no doubt last as long as I want it too
Given whoof's experience of using the wheel for loaded touring, I would not spend money now on swapping the rims over. Assuming you would have to pay someone else to do this for you, and that you would probably also have to pay for new spokes (unless you were lucky and the ERD [effective rim diameters] of the two rims were within 1mm or 2mm of each other), you will end up spending more money than a wheel off the shelf would have cost from Taylor Wheels
. Best to simply fit the wheel as is (apart maybe from stress relieving, which you should be able to do yourself) and get some use out of it. If after a few months or after heavy use it's showing signs of problems, then think about replacing the rim. For now, just get your money's worth from it.